i'm really proud of this policy. it's not perfect, but i think it's close to the best that was possible given all the constraints. i'm excited that this will make things easier for mods and reviewers, and hopeful that it will spark change in Rust's governance. blog.rust-lang.org/inside-rust/...

rust-lang/rust is adopting an LLM policy | Inside Rust Blog

Want to follow along with Rust development? Curious how you might get involved? Take a look!

blog.rust-lang.org

After 4 months of PRs, Rust now has a complete I/O module in alloc, and most of one in core. Hopefully a stabilization PR could even be accepted before the end of the year, who knows! doc.rust-lang.org/nightly/allo...

Nevermind! Completely broke Rust CI (after merge, that's new, more fun for the infra team 😈 ) Reverting it. Follow me for more tips on how to make a whole project lose 3 hours of their time with one small PR! T_T

imperio@imperioworld.bsky.social · 2d ago

The sync between rust and the GCC backend is done. We were a bit late there but finally caught up. Here's the PR with 224 commits (yep, you read it right ^^'): github.com/rust-lang/ru... Next cg_gcc progress report will be very interesting to read. :3 Next: why do we need to "sync"? 1/2

The sync between rust and the GCC backend is done. We were a bit late there but finally caught up. Here's the PR with 224 commits (yep, you read it right ^^'): github.com/rust-lang/ru... Next cg_gcc progress report will be very interesting to read. :3 Next: why do we need to "sync"? 1/2

Subtree cg_gcc sync (2026-07-24) by GuillaumeGomez · Pull Request #159844 · rust-lang/rust

View all comments cc @antoyo @bjorn3 r? ghost

github.com

Blogged about what I have been up to lately in upstream Rust.

With any luck, this is the cargo-semver-checks release that will start scanning the Rust standard library for breakage. Enjoy v0.50.0! What a fitting moment for a nice round number 🎉 Expect a blog post soon!

New blog post: How to speed up the Rust compiler in July 2026 nnethercote.github.io/2026/07/31/h...

We just merged the fourth (big) rustdoc perf improvement in a row: github.com/rust-lang/ru...: up to -39.9% github.com/rust-lang/ru...: up to -19.1% github.com/rust-lang/ru...: up to -28.4% github.com/rust-lang/ru...: up to -31.4% All because someone encountered a weird bug when using rustdoc. \o/

rustdoc: Only analyze head of self type when deciding impl inlining by camelid · Pull Request #159854 · rust-lang/rust

View all comments We only care about whether the self type is a generic or an item (inlined) in the current crate, so we don't actually need to compute the param_env, which is expensive when d...

github.com

Added support for "section linking" (putting an item in a specific section in the generated binary so the linker can do more optimizations) in the Rust GCC backend. 13 new Rust tests are now passing. :) PR: github.com/rust-lang/ru...

Add support for section linking by GuillaumeGomez · Pull Request #926 · rust-lang/rustc_codegen_gcc

Now that we have support for the section attribute, we can use it more. The wasm case it still not supported for now.

github.com

The rustdoc `doc_cfg` now takes into account the `cfg_attr` predicates for macro expansion (like `derive()`). It was one of the last blockers for this feature. Not many remaining now. =D PR: github.com/rust-lang/ru...

[rustdoc] Retrieve `cfg_attr` information for derived impls for `doc_cfg` feature by GuillaumeGomez · Pull Request #159722 · rust-lang/rust

View all comments Fixes #103300. After long last, this PR finally allows the derive proc-macro cfg_attr cfg predicates information to be kept so rustdoc can use it for its doc_cfg feature (cc #437...

github.com

Huge perf improvement (up to 34%!) was just merged in rustdoc. Instead of handling trait impls and then filtering them, we now do the opposite. Nice side-effect: notable traits feature now works even better. PR and link to the perf report: github.com/rust-lang/ru...

rustdoc: Only build extern trait impls if needed by camelid · Pull Request #159623 · rust-lang/rust

View all comments or, finally remove the BadImplStripper! Building inlined impls is expensive, and most of them end up being unneeded and stripped later in this function. So we should filter them ...

github.com

Just added support for aliases in Rust GCC backend, which is needed for EII (externally implementable items). Now 51 eii tests out of 60 pass! \o/ Big step forward, hopefully all tests will pass soon. PR: github.com/rust-lang/ru...

Add support for aliases by GuillaumeGomez · Pull Request #918 · rust-lang/rustc_codegen_gcc

Now only 9 tests/ui/eii tests are failing out of 60. I think the remaining ones comes from the link_section that we don't support yet. Considering most of the work is already done, I think it&#...

github.com

Hi everyone. I need your help! I recently added support to get system GPU usage in the Rust sysinfo crate. Next step was to get this info per-process. However, I'm now facing a very annoying Apple issue: undocumented API changing each version. So I can only test my own macOS version: 12.6. 1/4

crates.io is central in Rust ecosystem, but in my opinion, it doesn't fulfill its mission on multiple aspects. So much that an alternative website (libs.rs) was created. So I wrote a blog post about this: blog.guillaume-gomez.fr/articles/202... ⚠️ it's mostly me venting out about crates.io issues

crates.io: Rust Package Registry

crates.io serves as a central registry for sharing crates, which are packages or libraries written in Rust that you can use to enhance your projects

crates.io

It's been 84 years, but we're cooking again! For y'all who wanted to build rustic villages, here's a sneak peek of upcoming wooden walls 👀

Rust 1.97.0 has been released! 🌈 ✨ 🦀 Some of the highlights are new symbol mangling, a new Cargo setting for Rust warnings, linker output, and new integer methods: bit_width, {lowest,highest}_one, isolate_{lowest,highest}_one. Check out the blog post for details: blog.rust-lang.org/2026/07/09/R...

Announcing Rust 1.97.0 | Rust Blog

Empowering everyone to build reliable and efficient software.

blog.rust-lang.org

Added a new feature in `mdbook` to "zoom in" images by clicking on them. And of course, it works without JS. :) PR: github.com/rust-lang/md...

Add zoomable images feature by GuillaumeGomez · Pull Request #3127 · rust-lang/mdBook

Fixes #2075. The "zoomed-in" image looks like this: The JS is only used to "zoom out" images with the "escape key", otherwise the feature works entirely without JS. I...

github.com

Comme toujours, les pétitions valent ce qu'elles valent (kof kof duplomb kof kof) mais si vous avez 2min, pour éviter une police en totale roue libre : petitions.assemblee-nationale.fr/initiatives/...

I did a thing: github.com/FractalFir/c... (This is the entire rust compiler, converted to C - yes, it is functional).

Fixed a bug in rustdoc about inlining a `doc(no_inline)` foreign item. And also, inadvertently improve rustdoc performance by up to 8.5% (yep, WTF). PR: github.com/rust-lang/ru...

[rustdoc] Fix handling of inlining of `no_inline` of foreign items by GuillaumeGomez · Pull Request #158569 · rust-lang/rust

Fixes #92379. The magic of reexport_chain (and what happens when we forget to use it 😆 ). r? @camelid

github.com

Rust 1.96.1 has been released. This point release includes a fix for a miscompilation in a MIR optimization, a fix for http timeouts in Cargo, and patches the recent vulnerabilities in libssh2 which is used as part of Cargo. See the blog post for details: blog.rust-lang.org/2026/06/30/R...

Announcing Rust 1.96.1 | Rust Blog

Empowering everyone to build reliable and efficient software.

blog.rust-lang.org

New Rust GCC backend report: blog.antoyo.xyz/rustc_codege... We made progress to prevent regressions, which will allow us to spend a lot less time trying to fix unexpected failures everytime we sync with new rustc's updates. Slowly but steadily, we're moving forward! :)

Fixed a small layout bug for images in link in `mdbook` rendering. The link was not containing the image (look at the screenshots in the PR, will make more sense ^^'). PR: github.com/rust-lang/md...

Fix weird layout bug with images in links by GuillaumeGomez · Pull Request #3142 · rust-lang/mdBook

While working on #3127, I uncovered this bug when pressing tab around: What you see is the link being focused (an image cannot be focused unless we add tabindex to it, which we don't want) whe...

github.com

The `doc_cfg` feature made a big step forward today with github.com/rust-lang/ru.... Now it's complete, need to track down remaining bugs and then we can look at stabilizing it. 👀

[rustdoc] Update `doc_cfg` hide/show syntax by GuillaumeGomez · Pull Request #157871 · rust-lang/rust

View all comments Part of #43781. As discussed at the all-hands with the rustdoc team, we decided to follow the check-cfg syntax. So this PR implements it. Considering @Urgau made the check-cfg im...

github.com

Hopefully last message of the day (yeah still catching up on list of interesting stuff I worked on recently ^^')! Fixed a bug when you copied code from the source code pages by... removing the code to fix that bug. PR: github.com/rust-lang/ru... 1/2

Only copy visible content in clipboard in source code pages by GuillaumeGomez · Pull Request #158137 · rust-lang/rust

You can see this bug but enabling the --generate-macro-expansion rustdoc option. When selecting text which contains a macro expansion, it'll copy all the code, both displayed and hidden. To rep...

github.com

Forgot to mention but yet another improvement got merged on top of this feature with a new trick to be able to use an assoc const which contains only the needed number of bytes for each integer type. I recommend taking a look at the code, it's quite the interesting trick! github.com/rust-lang/ru...

Improve `NumBufferTrait` associated items by GuillaumeGomez · Pull Request #157976 · rust-lang/rust

It allows for NumBuffer::buf size to depend on the integer instead of being the same for all integers. The idea was suggested by @Amanieu (thanks a lot!). r? @Amanieu

github.com

imperio@imperioworld.bsky.social · 2mo ago

The `int_format_into` feature is now stable! It provides a very fast integer to string conversions. It's a built-in `itoa` replacement (the inspiration of this feature): ``` use core::fmt::NumBuffer; let n = 0u32; let mut buf = NumBuffer::new(); let n_s: &str = n.format_into(&mut buf); ``` 1/1

Fixed a very esoteric rustdoc bug in the "go to only result" setting. In one case, if you re-enable the setting, if one tab (other than the "In names" tab where it's the expected result) has exactly one result, you'll go there. Well, not anymore! PR: github.com/rust-lang/ru...

Fix bug when rustdoc "go to only result" setting is not working as expected" by GuillaumeGomez · Pull Request #158308 · rust-lang/rust

Can be reproduced as follows on std docs: Disable the Directly go to item in search if there is only one result setting Search for "var" (without the quotes) Enable the Directly go to it...

github.com

Bevy 0.19 is out now! It features Next Generation Scenes, Render Bigger Scenes Faster, Contact Shadows, More Feathers Widgets, Text Input, Richer Text, App Settings, Post Processing Effects, Improved Skinned Mesh Culling, and more! bevy.org/news/bevy-0-19

Bevy 0.19

Thanks to 261 contributors, 1185 pull requests, community reviewers, and our generous donors, we're happy to announce the Bevy 0.19 release on crates.…

bevy.org

I wrote a blog post to explain how I retrieve the information (cat pic included). Very technical read, and also some surprises, like which system is the simplest to get GPU info. :3 blog.guillaume-gomez.fr/articles/202... Enjoy!

sysinfo: Getting GPUs

Blog of Guillaume Gomez (sysinfo: Getting GPUs)

blog.guillaume-gomez.fr

imperio@imperioworld.bsky.social · 2mo ago

Just added support to query GPU information in the Rust sysinfo crate: github.com/GuillaumeGom.... So next sysinfo release, you will be able to query this new information too. 1/2

Little bugfix merged for the "jump to def" rustdoc feature (see it in action here: doc.rust-lang.org/nightly/nigh...). When an item had a `derive`, the link was not generated to the item's doc page but... to itself. Fixed in github.com/rust-lang/ru...